Ubuntu
xserver-xorg-video-ati package

  1. Bug #160871
  2. Comment #20

Comment 20 for bug 160871

Revision history for this message
Bryce Harrington (bryce) wrote : Re: Screen resolution issues in Hardy with Radeon Mobility 7500

(II) RADEON(0): Printing DDC gathered Modelines:
(II) RADEON(0): Modeline "1400x1050"x0.0 108.00 1400 1448 1560 1688 1050 1051 1054 1068 -hsync -vsync (64.0 kHz)
(II) RADEON(0): DDC Type: 4, Detected Monitor Type: 2
(II) RADEON(0): EDID data from the display on connector: Proprietary/LVDS ----------------------
(II) RADEON(0): Manufacturer: HTC Model: 17b0 Serial#: 420189172
...
(II) RADEON(0): First detailed timing not preferred mode in violation of standard!(II) RADEON(0): redX: 0.590 redY: 0.340 greenX: 0.320 greenY: 0.560

Looks like it's using DDC instead of EDID, and DDC is only returning the one resolution. Perhaps using option NoDDC would change it? If not, maybe the monitor needs quirked. Try setting NoDDC first, and let me know.